Determination of Neutron Flux in Brain Cancer Boron Neutron Capture Therapy Using Monte Carlo Simulation

Boron Neutron Capture Therapy (BNCT) is a relatively safer technology for killing cancer cells, one of which the Glioblastoma multiforme. One main components BNCT equipment collimator functions as an exit point epithermal neutron particles that hit cells. In addition to experimental method, research can be carried out by modeling, including using MCNPX software based on Monte Carlo Method. This aimed determine flux distribution fast and neutrons dose rate gamma target cells in phantom head ORNL MIRD. Modeling has three parts: cell cards, surface data cards. A tally used card calculate flux. Based calculation modeling results, 2.87 x 109 n/cm2.s. The ratio 2.29 10-14 Gy.cm2/n. Then, balance 1.64 Gy.cm2/n, thermal 0.004. this study, hitting was moderated at 4 cm so depth 8 cm, energy converted into neutrons. analysis it concluded will interact with tissue neutrons, not